OpromUpdateDxeNeonCityFPGA

Function Table

Address	Name	Description
	DebugPrint
	DebugAssert
	ReadUnaligned64
	IsGuidEqual
	PcieSlotChecker
	GetPcieSlotConfigProtocol0
	GetPcieSlotTable1
	GetPcieSlotTable2
	SetPcieSlotNumberCallback
	_ModuleEntryPoint
Global	variables - cached UEFI system table pointers and protocol interfaces.
Initialized	by _ModuleEntryPoint.
EFI_HANDLE	gImageHandle = NULL; ///< @ 0xF20: Image handle from DXE dispatcher
Protocol	GUIDs and configuration data (defined in .rdata section).
Forward	declarations of internal functions
VOID	*EFIAPI GetHobList (VOID);
SystemTable	is at a fixed offset from gST.
gST	+ 0x68 (104) = NumberOfTableEntries
gST	+ 0x70 (112) = ConfigurationTable pointer
EntryCount	*= (UINTN* )((UINT8 )gST + 104);*
Each	config table entry: 16-byte GUID + 8-byte pointer (24 bytes total)
if	(IsGuidEqual (
PoolSize	= (UINTN)gBS->AllocatePool (31);
if	(gBS->LocateProtocol (&gDebugLibProtocolGuid, NULL, &gDebugProtocol) < 0) {
Read	current CMOS index, preserving NMI enable bit
CmosNmiSave	= __inbyte (0x70);
Read	debug level from CMOS register 0x4B
DebugLevel	= __inbyte (0x71);
Bit	1 indicates debug capability
DebugLevel	= ((volatile UINT8 )0xFDAF0490) & 2	1;**
Convert	level 1..4 into ErrorLevel mask
if	(DebugLevel - 1 <= 0xFD) {
EFI_D_ERROR	} else {
Check	mask match and call DebugPrint if it matches
if	((ErrorLevel & 0x80000000) != 0) {
Callback	0: PcieSlotChecker
This	slot bit is not set - skip
Bitmap	= SlotBitmap;
Open	PCI Root Bridge I/O Protocol for PCI config access
Build	**config address: ((Bus	((Device	(Function << 8)) << 8)) << 8)**
ConfigBase	**= (Entry->Bus	((Entry->Device	(Entry->Function << 8)) << 8)) << 8;**
Read	PCI config register at offset 0x19 (sub-class code)
Read	PCI config register at offset 0x1A (base class code)
Check	if PcieAddress is in range [ConfigByte1, ConfigByte2]
InRange	= FALSE;
Callback	1: GetPcieSlotConfigProtocol0
Callback	2: GetPcieSlotTable1
Callback	3: GetPcieSlotTable2
Callback	4: SetPcieSlotNumberCallback
Entry	Point: _ModuleEntryPoint
Save	image handle (assert if NULL)
gImageHandle	= (UINT64)ImageHandle;
Save	system table (assert if NULL)
gST	= (UINT64)SystemTable;
Save	boot services (assert if NULL)
gBS	= (UINT64)SystemTable->BootServices;
Save	runtime services (assert if NULL)
gRT	= (UINT64)SystemTable->RuntimeServices;
Locate	HOB list
GetHobList	();
Log	driver type
DebugPrint	(0x80000000, "UBA:OpromUpdate-TypeNeonCityFPGA\n");
Locate	UBA board-type protocol
BoardProtocol	= NULL;
Register	OpROM update config: 5 callback functions + GUID + 48 bytes config
if	(!EFI_ERROR (Status)) {

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